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Knowledge of air cylinder

Discussion in 'Anything Airgun Related' started by mikigough, Aug 5, 2014.

  1. mikigough

    mikigough Engaging Member

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    After paying £8 to get filled, I now have a leak from where the guage screws in, anyone know what it needs, can I unscrew it when the bottle is full. It only leaks when I'm filling the gun , So NOT all the time.

    Regards

    Mickey.
     
  2. ratman60

    ratman60 Pro Poster

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    hello, no dont ever do that, you can only unscrew the air tube fill pipe from the guage do not not try anything else with a full air bottle , do you mean where the fill pipe fits into the guage if that is so just tighten up a fraction. try to give a bit more info or photo, compressed air tanks/bottles need carefull attention. all guages have a bleed valve on the opposite side so you need make sure tight when filling and use this to de compress so you can take out adapter from rifle. then tighten for next filling.
     
    Last edited: Aug 5, 2014
  3. mattyts

    mattyts Donator

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    do you mean where the gauge screws into the neck of the bottle?
     
  4. ratman60

    ratman60 Pro Poster

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    hello, if mattys right TAKE STRAIGHT BACK TO WHERE FILLED AND PLEASE DONT TRY FIX YOURSELF
     
    Last edited: Aug 5, 2014
  5. ratman60

    ratman60 Pro Poster

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    i see you mention the cost of filling? and went to Eley? if that is a gun shop as others said to expensive, , there are 2 dive shops near you so try them one in cambridge one in bury which is nearest.
     
  6. mikigough

    mikigough Engaging Member

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    Thanks for replies, yes it's where the gauge screws into the bottle. I called him this morning and he said he tightened it and can do no more than that.

    Mickey.
     
  7. mattyts

    mattyts Donator

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    He shouldn't even be doing that I don't think,take it back to a diving shop
     
  8. Kenbarcon

    Kenbarcon Donator

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    So he knew it was leaking and never said anything, thats just bang out of order and damn dangerous.
     
  9. RichieRich

    RichieRich Ping!

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    The gauge could probably do with a bit more pfte tape on the thread before screwing it back in.

    Is your gauge fitted to the tank like this?
    [​IMG]

    Or like this?
    [​IMG]
     
  10. ratman60

    ratman60 Pro Poster

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    mickey, that is very dangerous so do not use or try do your self, that mans a prat as he is not capable or probably not qualified to do. mickey cut your loses and take the bottle asap to one of those dive centres, phone first to make sure, it might need a re test or at least to de compress and fix leak and re fill. in fact you said you had 2 bottles filled so take both and get them checked and fix the leaky one. i cant reiterate how important to be carefull with compressed air/tanks etc. anyway i hope you get sorted
     
  11. ratman60

    ratman60 Pro Poster

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    hello, i no i go on chaps about this and hope mickey cant get sorted but i have seen the devistation a cylinder can do and thats why i say be safe and sure and get a profesional to sort out and by all accounts it is defo not the eley shop.
     
  12. dave goodall

    dave goodall Donator

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    Hold on why does it need a retest because the gauge is leaking ??? As richie rich as stated either tighten it up add some ptfe tape or buy a new gauge from best fittings job done 2 mins of a job nothing like scare mongering most gauges leak after been transported about taking knocks making it sound like a ticking time bomb is bit if a joke imo if in doubt ring richard at best fittings for advice off a profesinal but bet my last poundhe dosnt sell u a replacement gauge and advises ptfe tape slating the shop is no good neither its not his responsabilty that the gauge s leaking all hes done is fill the bottle think he means when he tightend it up he mens the shut off valve
     
    Last edited: Aug 5, 2014
  13. mattyts

    mattyts Donator

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    He says it's where it's screwed into the neck of the bottle,you recommend un screwing that? :eek:
     
  14. mikigough

    mikigough Engaging Member

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    First photo, Richie, straight to the bottle.

    Mickey.
     
  15. dave goodall

    dave goodall Donator

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    Yes u can still unscrew it as long as its shut of hes talking about the gauge leaking not the bottle neck !!
     
  16. dave goodall

    dave goodall Donator

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    Instead of asking on a forum and geting lots of mixed responces ring best fittings who deal with this sort of stuff day in day out
     
  17. mikigough

    mikigough Engaging Member

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    I did tell him it was leaking when I took it to fill.
    Mickey.
     
  18. oliver13

    oliver13 Donator

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    Is the gauge before or after the cylinder valve? It sounds like it's after the valve & in theory you could work on it but it's not a good idea to do any work on a pressurised cylinder at all.
    Maybe you could sort it but ideally you want to empty the cylinder immediately in case the leak is due to mismatched threads on the gauge, it's conceivable there's a tapered thread into parallel, or some other issue like a crack.
    Depressurise the cylinder & get it fixed is my advice, which is a bit of a shame for such expensive air I know.
     
  19. 18 Wheeler

    18 Wheeler Busy Member

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    Probably the best course of action.

    The guage is downstream of the valve ie. only pressurised when the cylinder valve is open. If not then it would read cylinder pressure even with the valve closed, additionally it is only leaking during filling, another indicator that it is an unpressurized with the valve closed.

    I understand why people are cautious with HPA and until the OP's problem is definitively confirmed then that may be sensible, but there's also some errors on this thread IMO. If in doubt take it to a reputable dive shop for advice, but removal of a guage isn't really a specialist job.
     
  20. RichieRich

    RichieRich Ping!

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    Right, As long as the gauge only shows pressure when the valve is opened, then it is not under pressure when the line is bled and valve closed. In this case, you can remove the gauge, clean the threads and apply 3-4 turns of pfte tape to the gauge's thread. Then screw it back into the valve assembly til it becomes tight.

    Test once re-fitted and you should be ok from there.
     

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